Looking for a summer alpine jacket. Something to bring along on spearhead/diamond ect. Want to find a nice balance of waterproof/breathable material, lightweight, and maybe even some stretch. Anyone have any thoughts?

Assuming you want a full waterproof shell and you want to climb in it I'd go for one of the newer, more breathable membranes. eVent, MH Dry Q Elite, etc. Rab has some new shells that are pretty awesome looking and there is no question that they make excellent products.

Edited to add: Maybe you can go even lighter than a full membrane and get something like a Pertex Shield jacket. I personally would go for a good windproof and a super light emergency rain shell in my pack if I were planning on spending summer in RMNP.

Light (6 ounces), waterproof, very packable, but not stretchy: OR Helium 2. Just got one and it's awesome. Isn't going to breathe like Event or DryQ or Neoshell, but for a summer rain jacket that you aren't going to wear most of the time it is hard to beat. And costs a lot less too.

Assuming you want a full waterproof shell and you want to climb in it I'd go for one of the newer, more breathable membranes. eVent, MH Dry Q Elite, etc. Rab has some new shells that are pretty awesome looking and there is no question that they make excellent products. Edited to add: Maybe you can go even lighter than a full membrane and get something like a Pertex Shield jacket. I personally would go for a good windproof and a super light emergency rain shell in my pack if I were planning on spending summer in RMNP.

Dry Q is eVent. GE is now allowing people to use eVent but rebrand it.